Comparison of layout engines (HTML5 media)

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The HTML5 draft specification defines several tags which allow video and audio to be included natively and semantically in HTML markup. This page compares support for aspects of this specification among layout engines.

Explanation of the tables[edit]

Engine nomenclature[edit]

Rather than the names of web browsers, the names of the underlying engines are used. The browsers that use the various engines are listed below.

Layout engine Release version Preview version Used by
Amaya 11.4.7[1] N/A No longer developed; Amaya
Blink 537.36 Chromium/Chrome (28+), Opera (15+) and Yandex

28.0 (March 18, 2014; 28 days ago (2014-03-18)[2]) [±]
ESR 24.4.0 (March 18, 2014; 28 days ago (2014-03-18)[3]) [±]

29.0 Beta 6 (April 8, 2014; 7 days ago (2014-04-08)[4][5]) [±] All Mozilla software, including Firefox; SeaMonkey and Galeon; Camino; K-Meleon; Flock (up to 2.x); Debian IceWeasel; GNU IceCat (formerly GNU IceWeasel); Icedove, Iceape and Iceowl; Fennec. Also used by the Maple platform in 2010 and 2011 Samsung "SmartTV" devices which are based on the build used in Firefox 3.0.[citation needed] Nokia Asha platform is also using Gecko for web apps rendering.
KHTML 4.12.3[6] N/A Konqueror[note 1]
Presto 2.12.388 N/A No longer developed; Opera and Opera Mobile use Blink now; Nintendo DS & DSi Browser; Internet Channel
Tasman (IE 5.2.3 for Mac) none No longer developed (aborted in 2003); Internet Explorer 5+ for Mac OS X
Trident 7.0 (IE 11) Internet Explorer and other Internet Explorer shells like Maxthon (Microsoft Windows operating systems only), Windows Phone 8
WebKit 534.20 nightly build Tizen (both OS and browser), Safari (both desktop and mobile), Google Chrome (before 28), Maxthon 3, Shiira, iCab 4, OmniWeb 5.5+, Web, Adobe AIR, Midori, Adobe Dreamweaver CS4 and CS5, Android browser, Palm webOS browser, Symbian S60 browser, OWB, Steam, Rekonq, Arora, Flock (version 3+), RockMelt, Dolphin Browser, Sleipnir, Konqueror[note 1], PhantomJS A headless browser for testing, rekonq. Used by the LG Smart TV platform to enable web content on TVs.
  1. ^ a b In Konqueror, the user can switch layout engine.


Values indicate the level of support in the most recent version of the layout engine, or (if a version number is given) in the specified version. Version numbers without any other value indicate the version at which the layout engine first fully supported the feature.

Value Meaning
Yes Indicates that the layout engine fully supports this property/element when valid values are used.
No Indicates that the property/element is completely ignored.
Partial Indicates that the property/element is understood, but that not all values are supported. Supported values are implemented correctly.
Incorrect Indicates that the property/element is understood, but that it is not implemented correctly in all cases.
Experimental Indicates that the property/element is understood, but supported under an alternate name. May be incomplete or buggy.
Dropped Indicates that the property/element is no longer supported.
Nightly build Indicates that the property/element is supported to some extent in an experimental/nightly build. Future support is expected.
Depends Indicates that the property/element is supported only on certain platforms, or if certain settings are configured.

Element attributes[edit]

Media elements allow some attributes to be set directly in the tag.

Trident Gecko WebKit Presto
<audio> attributes
src 5.0[t 1] 1.9.1 525 2.5
preload 2.0[note 1][g 1] Experimental[note 1]
autoplay 1.9.1 2.5
loop 11.0[g 2]
controls 1.9.1
<video> attributes
src 5.0[t 1] 1.9.1 525 2.5
preload 2.0[note 1][g 1] Experimental[note 1]
autoplay 1.9.1 2.5
loop 11.0[g 2]
controls 1.9.1
poster 1.9.2[g 3]
width 1.9.1
<source> attributes
src 5.0[t 1] 1.9.1 525[w 1] 2.5
media 15.0[g 4]
<track> attributes
kind 6.0[t 2] 24.0[g 5] Yes[w 2] No

DOM attributes[edit]

Some attributes related to media elements are exposed in the DOM.

Trident Gecko WebKit Presto[p 1]
Error state
MediaError 5.0 [t 3] 1.9.1  ? 2.5
Network state
src 5.0[t 1] 1.9.1  ? 2.5
preload 2.0[note 1][g 1] No
buffered 2.0[g 6]
load() 1.9.1 2.5
canPlayType() 533[w 3]
Ready state
readyState 5.0[t 1] 1.9.1  ? 2.5
Playback state
currentTime 5.0[t 1] 1.9.1  ? 2.5
startTime No
duration 1.9.1
defaultPlaybackRate 20.0[g 7] No
played 15.0[g 8]
seekable 8.0[g 9]
ended 1.9.1 2.5
loop 11.0[g 2]
play() 1.9.1
controls 5.0[t 1] 1.9.1  ? 2.5

DOM events[edit]

Media elements introduce new events to handle conditions which apply only to those elements, such as pausing/resuming.

Trident Gecko[g 10] WebKit Presto
loadstart 5.0[t 4] 1.9.1  ?  ?
suspend 1.9.2
abort 1.9.1
stalled 8.0[g 11]
play 1.9.1
playing No
canplay 1.9.1

Video format support[edit]

This table documents support for video codecs by the <video> element.

Trident Gecko WebKit Presto
Ogg Theora Manual install[note 2] 1.9.1[g 12] Depends[note 3] 2.5
H.264 5.0[t 7] No[g 13] Depends (525)[note 3][w 9] Depends[note 4]
WebM VP8 Manual install[note 5][note 6]

[note 7]

2.0[g 14][g 15] Depends (534)[w 10] 2.6.30[p 3][p 4][p 5]

Audio format support[edit]

This table documents support for audio codecs by the <audio> element.

Trident Gecko WebKit Presto
Ogg Vorbis No 1.9.1[g 12] Depends[note 3] 2.5
WAV PCM 525[note 3] 2.0
MP3 5.0[t 11] No[g 16] Depends[note 4]
Speex No No[g 17] Depends[note 3] No
Opus No 15.0[g 18] Depends[note 3] No

See also[edit]


  1. ^ a b c d e Supports preload under the older name autobuffer.
  2. ^ Supported if OpenCodecs is installed. Also possible with Google Chrome Frame[t 5][t 6]
  3. ^ a b c d e f WebKit on Mac OS X uses QuickTime, and supports whatever formats that does.[w 4] By default, this includes H.264, MP3, AAC and WAV PCM, but not Ogg Theora or Vorbis. These are supported only if installed as third-party codecs, such as XiphQT. Google Chrome supports Theora, Vorbis, WebM, and MP3.[w 5] Chromium can be compiled to support anything that FFmpeg supports, and may or may not support patented formats such as H.264 and MP3.[w 6] Origyn Web Browser for MorphOS uses also FFmpeg for playing HTML5 media content.[w 7][w 8]
  4. ^ a b On Linux and FreeBSD, Presto 2.5 uses the system version of the GStreamer library, and is able to play any formats supported by GStreamer (including H.264, MP3, AAC and others, if codecs are installed). On other platforms, it only supports Ogg Theora for video; and Ogg Vorbis and WAVE PCM for sound.[p 2]
  5. ^ Google released a WebM component for Media Foundation to allow the playback of WebM files in IE9 through the standard HTML5 <video> tag.[t 8]
  6. ^ Possible if the user has installed a VP8 codec on Windows for IE9.[t 9]
  7. ^ Internet Explorer 9 will support VP8 only if the appropriate codecs are installed on the user's computer.[t 10]


  1. ^ Amaya Binary Releases, Most recent download link in stable
  2. ^ "Firefox Notes - Desktop". March 18, 2014. Retrieved March 18, 2014. 
  3. ^ "Firefox ESR 24.4.0 Notes". March 18, 2014. Retrieved March 18, 2014. 
  4. ^ "Firefox Beta Notes Desktop". 2014-03-20. Retrieved 2014-03-20. 
  5. ^ "Mozilla Firefox Web Browser — Download Firefox Beta in your language — Mozilla". Retrieved 2014-04-09. 
  6. ^ Download for kdelibs, Most recent download link in stable

Trident references[edit]

  1. ^ a b c d e f g Internet Explorer Platform Preview Guide for Developers, Microsoft 
  2. ^ "track element - track object (Internet Explorer)". Microsoft. Retrieved 12 July 2013. 
  3. ^ MSDN HTMLMediaError Object for Internet Explorer 9, Microsoft 
  4. ^ "video object". Microsoft. Retrieved 12 July 2013. 
  5. ^ Kevin Carle and Chris Zacharias (2010-01-20), Introducing YouTube HTML5 Supported Videos, Official YouTube Blog, retrieved 2010-03-12 
  6. ^ Dougherty, Brad (2010-01-21), Try our new HTML5 player!, Vimeo Staff Blog, retrieved 2010-03-12 
  7. ^ McCracken, Harry (2010-03-16), Microsoft Previews the Revamped Internet Explorer 9 Platform, Technologizer 
  8. ^ Jazayeri, Mike (2011-01-14), More about the Chrome HTML Video Codec Change, Google 
  9. ^ Hachamovitch, Dean (2010-05-19), Another Follow-up on HTML5 Video in IE9, Microsoft 
  10. ^ Hachamovitch, Dean (2010-05-19), Another Follow-up on HTML5 Video in IE9, Microsoft 
  11. ^ Branscombe, Mary (2010-03-16), Microsoft previews Internet Explorer 9, TechRadar UK 

Gecko references[edit]

WebKit references[edit]

  1. ^ Pfeiffer, Silvia (2009-12-13), [whatwg] Quality Values for Media Source Elements 
  2. ^ April 2012 HTML5 Media Element & WebAudio – WebKit 
  3. ^ Bug 24364 - Add HTMLMediaElement canPlayType method, WebKit 
  4. ^ Koivisto, Antti (2007-11-12), HTML5 Media Support, WebKit 
  5. ^ Look for "GOOGLE_CHROME_BUILD" 
  6. ^ DiBona, Chris (2009-06-01), [whatwg] Google's use of FFmpeg in Chromium and Chrome Was: Re: MPEG-1 subset proposal for HTML5 video codec, Google 
  7. ^ Origyn Web Browser for MorphOS, Fabian Coeurjoly, retrieved 2010-01-04 
  8. ^ Holwerda, Thom (2010-03-08), Origyn Web Browser 1.7 Supports HTML5 Media, More, OSNews, retrieved 2010-03-08 
  9. ^ HTML Video Codec Support in Chrome, retrieved 2010-01-22 
  10. ^ Bankoski, Jim (2010-05-19), WebM and VP8 land in Chromium, Google 

Presto references[edit]

  1. ^ Pieters, Simon (2010-03-10), Everything you need to know about HTML5 video and audio, Opera 
  2. ^ Jägenstedt, Philip (2009-12-31), (re-)Introducing <video>, Opera 
  3. ^ Lie, Håkon Wium (2010-05-19), Welcome, WebM <video>!, Opera 
  4. ^ Mills, Chris (2010-05-19), Opera supports the WebM video format, Opera 
  5. ^ Kleinhout, Huib (2010-07-01), Opera 10.60 goes final, Opera 

External links[edit]